MCi Crusader II 1989 Maintenance Manual page 221

Date
1-1-89
Page 7-1
MC-9 MAINTENANCE MANUAL
DESCRIPTION
The coach uses a 24 volt electrical system. A self-rectified
alternator is gear driven from the engine and can be reached
through the left side rear engine compartment door.
Wiring diagrams for the electrical system are included at the
end of this section.
~-~\~'I
_,.,......,_:;:;2:::..------•: ,i
·"'
.,,
-
.
Figure 7-1. Battery Disconnect.
BATTERY DISCONNECT
A main battery disconnect switch is provided to shut off all
electrical supply from the batteries. The switch is mounted on a
vertical panel above the batteries and can be reached by open-
ing the battery compartment door. To disconnect the batteries.
pull knob down to OFF position. See figure 7-1.
TESTING CIRCUITS
A careful study of the wiring diagrams should be made to
determine the source and flow of current through each electri-
cal circuit. When a circuit is thoroughly understood, a point-to-
po,nt check can be made with the aid of the applicable wiring
diagrams. Any circuit may be tested for continuity or shorts with
a suitable volt-ohm meter.
All electrical connections must be kept clean and tight.
Loose or corroded connections will cause discharged battery,
difficult starting, dim lights. and improper functioning of other
electrical equipment Inspect all wiring ·connections at regular
intervals. Make sure knurled nuts on all amphenol plugs are
securely tightened.
.;1RCUIT BREAKERS
All eiectrical circuits are protected by circuit breakers. The
main circuit breaker and the two circuit breakers protecting the
air conditioning system blower motors are located at the front of
the baggage compartment and can be reached through the left
front baggage door. See figure 7-2. ·
The main circuit breaker (105 amp) is an automatic• reset
type. The condenser motor (105 amp) must be manually reset.
Figure 7-2. A/C Circuit Breaker in Left Front
Baggage Compartment.
1. Automatic Reset Circuit Breaker
(105 Amp.)
2. Manual Reset Condenser Motor Circuit Breaker
(105 Amp.)
3. Manual Reset Evaporator Motor Circuit Breaker
(80 Amp.)
Figure 7-3. 110V In-Station Lighting Circuit Breaker Box in
Lett Front Service Compartment.